[_delirium]

A lot of the research, at least that I'm familiar with, actually comes a bit more from the left, generally pro-sex but skeptical of (at least some kinds of) porn, with the arguments being that porn tends to promote unrealistic expectations and a certain sort of attitude towards women, which get in the way of forming healthy real-world sexual relationships.

I'm not sure how solid any of the conclusions are, though, and I don't know what the ED research would be referring to. Here's one (slightly dated) meta-analysis that does find some association with aggression, especially following watching porn that involves violence: http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2958.1995....